1. Department of Surgery, Harvard Medical School and Laboratory of Special Microbiology, Peter Bent Brigham Hospital, Boston, MA.
2. Department of Surgery, Medical College of Wisconsin and Good Samaritan Medical Center, Milwaukee, WI.
3. Department of Medicine, Harvard Medical School and Laboratory of Special Microbiology, Peter Bent Brigham Hospital, Boston, MA.
4. Emeritus Professor, Department of Surgery, Harvard Medical School, Boston, MA.